Christina Aguilera did her "Beautiful" vocal in one take; the opening line, "Don't look at me," is something she said to her friend in the studio who was there to offer support.
Ed Sheeran thought he wrote the x track "Photograph" on 6th Street in Denver, so he got a tattoo saying 6 ST. But when he returned it turned out the street was actually 6th Avenue.
"Pink Cadillac" was a B-side for Bruce Springsteen in 1984, but after Aretha Franklin sang about pink Cadillacs on "Freeway Of Love" the following year, Natalie Cole covered the song and had a hit with it in 1988.
Icona Pop considers "I Love It" a kiss-off to their boyfriends: "we just wanted to get the song out and get the pigs to hear it," Jawo said.
"Everybody Have Fun Tonight" is a rare hit with the band's name used as a verb: "Everybody Wang Chung tonight." The band says it can mean whatever you'd like it to.
The Temptations sang backup on "Super Freak" by Rick James. He mentions them in the song when he says, "Temptations, sing!"
On the "schizoid element" of his lyrics, and a famous line from "Everything Zen."
In her days with The Runaways, Joan Jett saw The Arrows perform "I Love Rock And Roll," which Alan Merrill co-wrote - that story and much more from this glam rock pioneer.
"25 or 6 to 4" to "Semi-Charmed Life" - see if you can spot the songs that are really about drugs.
Does Angus really drink himself silly? Did their name come from a sewing machine? See if you can spot the real stories about AC/DC.
Writing with Phil Lynott, Scott saw their ill-fated frontman move to a darker place in his life and lyrics.
It started with a bouncy MTV classic. Nirvana and MCR made them scary, then Gwen, Avril and Madonna put on the pom poms.
